[gvfs] archive: Handle open failure

[Ross Lagerwall <rossl src gnome org>]

commit 0cee04b8abcdb25f98a616ed8d785c92f05f7102
Author: Ross Lagerwall <rosslagerwall gmail com>
Date:   Tue Oct 1 21:29:44 2013 +0200

    archive: Handle open failure
    
    If gvfs_archive_open fails, libarchive immediately calls
    gvfs_archive_close which causes a crash due to calling g_object_unref on
    the NULL stream.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=589028

 daemon/gvfsbackendarchive.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/daemon/gvfsbackendarchive.c b/daemon/gvfsbackendarchive.c
index 48008d9..664a41c 100644
--- a/daemon/gvfsbackendarchive.c
+++ b/daemon/gvfsbackendarchive.c
@@ -83,6 +83,7 @@ typedef struct {
   GFile *          file;
   GFileInputStream *stream;
   GVfsJob *        job;
+  GVfsBackendArchive *backend;
   GError *         error;
   guchar           data[4096];
 } GVfsArchive;
@@ -156,8 +157,9 @@ gvfs_archive_close (struct archive *archive,
   GVfsArchive *d = data;
 
   DEBUG ("CLOSE\n");
-  g_object_unref (d->stream);
-  d->stream = NULL;
+  if (!d->stream)
+    g_vfs_backend_force_unmount (G_VFS_BACKEND (d->backend));
+  g_clear_object (&d->stream);
   return ARCHIVE_OK;
 }
 
@@ -205,6 +207,7 @@ gvfs_archive_finish (GVfsArchive *archive)
 {
   gvfs_archive_pop_job (archive);
 
+  g_object_unref (archive->backend);
   archive_read_free (archive->archive);
   g_slice_free (GVfsArchive, archive);
 }
@@ -217,6 +220,7 @@ gvfs_archive_new (GVfsBackendArchive *ba, GVfsJob *job)
   
   d = g_slice_new0 (GVfsArchive);
 
+  d->backend = g_object_ref (ba);
   d->file = ba->file;
   gvfs_archive_push_job (d, job);